9+ Python Return 使い方 References

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Introduction

Python is a popular, high-level programming language used for various applications, including web development, data analysis, and machine learning. One of the essential features of Python is the return statement, which enables a function to return a value to the caller. In this article, we will discuss the basics of how to use the return statement in Python.

The Role of the Return Statement

In Python, a function is a block of reusable code that performs a specific task. It can take input parameters and return output values. The return statement is used in a function to send a result back to the caller. It allows the function to terminate and pass the result of the computation to the calling code.

Syntax of the Return Statement

The syntax of the return statement is straightforward. It consists of the return keyword, followed by the value to be returned (optional).

Here's an example:

def add_numbers(x, y): result = x + y return result

In this example, the function add_numbers takes two input parameters, x and y. It adds them together and returns the result using the return statement.

Using Multiple Return Statements

A function can contain multiple return statements. It allows the function to return different values based on certain conditions. For example:

def check_number(num): if num > 0: return "Positive" elif num < 0: return "Negative" else: return "Zero"

In this example, the function check_number takes a parameter num and returns "Positive" if the number is greater than 0, "Negative" if the number is less than 0, and "Zero" if the number is 0.

Conclusion

The return statement is a crucial part of Python programming. It allows a function to return a value to the calling code, which enables us to reuse code and write more efficient programs. By understanding the basics of how to use the return statement in Python, we can build more complex and robust applications.